Shifting device for drills on bookbinding machines



Nov. 20, 1928 N. S. WELK SHIFTING DEVICE FOR DRILLS ON BOOKBINDING MACHINES Filed May 25, 1927 3 Sheets-Sheet INVENTOR w AM ATTORNEYS N. S. WELK SHIFTING DEVICE FOR DRILLS ON BOOKBINDING' MACHINES Nov. 20, 1928. 1,692,318

' Filed May 25, 1927 :s Sheets-Sheet 2 INVENTOR' mm Q 7MMAM 4 ATTORNEYS,

N. S. WELK SHIFTING DEVICE FOR DRILLS ON BOOKBINDING MACHINES Filed May 25, 1927 I5 Sheets-Sheet 5 Fig.3

W A (MM INVENTQR 66 WW 7 QM ATTORNEYS Patented Nov. 20, 192 8.

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SHIT-TING DEVICE Foe DRILLs on sw etest-m exactness.

Application filed May 2 My invention relates 'to machines at the class set forth and described in my cop'ending application, Serial No. 136,970, and'has for its object, to provide means whereby the shifting of the drills into the desired position for drilling the book, or other material to be found, w ill at the same time operate to close an electrical contact so that the current will reach the electric motor and the drills can be driven thereby.

My invention has for its further object,'to provide a device so that after the holes are drilled in the book to be bound the drills can be shifted laterally leaving the space below clear and the binding posts o'r'other fasteners may be inserted in the holes without any danger of operators hand coming in contact with the sharp points of the drills with the resultant injury. f

In the drawings I have shown the upper part of a machine, corresponding to the upper part ofthe machine described in the copending application hereinbefore referred to, and as, obviously, it forms-no part of my present invention and is shown merely for the purpose of illustrating the correct form of use of my present invention, I shall not describe it, but refer simply to the said copending application which contains a full and complete disclosure thereof. In the drawings Fig. 1 is a front elevation showing my improvement in position on a binding machine;

Fig. 2 is a side elevation of the same;

.Fg. 3 is a cross-sectional View, taken on line 33, in Fig. 1, in the direction indicated by the arrows.

Similar reference numerals refer to similar parts throughout the entire description.

The material tobe bound is placed upon a supporting plate 10, means being provided to move this plate 10 vertically'so as to cause the drills 11 and 12 to drill the desired holes, in the material to be bound. These drills 11 and 12 are mounted on carriages 13 and 13, which are slidable longitudinally upon shafts 1 1, and are provided with a worm and gear drive 15, the gear being slidably mounted upon a shaft 16, which is driven by means ofv a silent chain 17, through the medium of an electric motor 18. The electric motor 18'i s supplied by current through conductors. 19 and 20, which lead from a source of electric current supply (not shown). These conductors 19 and 20 are connected to suitable bind- 1927. serial m. 155335 ing posts 21 and 22, and "thence through fuses mounted in fuse boXes 23,.to contacts 2 1 and 2 5, which aresuitablyconnected to a knifeb'lade Switch 26. This switch 26 is adapted to contact with suitable extensions of binding posts 27 and 28, from which conductors 29 and 30 lead to the motor 18. The knife-blade switcli26'is carried by and swings upon pivots 3:1, and is attached to a fcrank 32, the ends of which are journale'd in bearings as and 34', formed in the side walls of the casing 35, in which the switch 26 is mounted. The end 36 of the crank 32 is adapted to fit within a slot 37 on the switch 26. The opposite end 39 of the crank '32 is secured to a 15111139, which is suitably, attached to a lever 10, which is mounted upon a pivot 11. Tliislever 40 has pivotally attached to it, by means of a pivot or pin 12, a bar 43. This bar 48 is provided with a plurality of spaced slots '44, in which may be inserted pins 45, which are rig-idly mounted upon the carriages l3 and 13, t h'ese slots 4 1 being provided so thattlie drills 11 a'nd312 my be properly spacea'in the desired locations to drill the material being bound. The bar 43 may be elevated sulficiently to permit the carriages: 13 and .13 to be shifted to any predetermined position on the guide bars or shafts 14-.

From the foregoing description, to persons skilled in the art it will be obvious that if the operator grasps the handle 16 of the lever 10 and moves it laterally, it will cause the slots 14: to engage the pins 45, and this will operate to move the drill carriages 13 and 13' laterally along the shafts 14: until they are brought into correct position for performing the drilling operation; but this same movement of thelever 40 will, through the medium of the link 38 and the crank 32, shift the knife-blade switch .26 and cause contact, so that the electric current can flow to the electric motor 18. This will, through the chain drive 17 rotate the, drills 11 and 12, so that when the plate 10 is lowered and the material to be bound is brought into contact with the drills 11 and 12, the drilling operation will be properly performed.

When the material has been elevated, so that the drills 11 and leave out of the material to bebound, as shown in Fig. 1, by throwing the lever 40 to the position indicated bythedotted lines in Fig. 3, the re-v verse of the operation hereinbefore described will take place, and this will break the electrical contact and the drills will cease to rotate. Y

For the purpose of a full disclosure of my invention, 1 have described in some detail a specific embodiment thereof, but it will be apparent, to persons skilled in the art, that numerous changes might be made in the physical embodiment of my invention within the scope of the claims, and I do not desire, therefore, to be understood as limiting myself in the broader aspects of my inventlon to the specific constructions 'shown' and described.

Having thus described my invention, what I regard as new, and desire to secure by Letters Patent of the United States, is:

l. The combination, with a book-binding machine, of a plurality of electrically driven drills suitably connectedcto a source of electric power, carriages on which said drills are mounted, a guide upon which said carriages are laterally slidable, an electrical switch in the line, means connected to said switch and said carriages whereby the lateral movement of the carriages in one direction'operates to close said electrical switch and in the other direction to open it and move the said drills out of the path of the drilled holes.

'2. The combination, with a book-binding machine, of a plurality of electrically driven drills suitably connected to a source of electric power, carriages on which said drills are mounted, a guide upon which said carriages are laterally slidable, an electrical contact in the line, a lever pivotally connected to said carriages, a link connected to the end. of said lever, a crank connected to said contact, said link being connected to the arm of the crank, whereby the movement of said lever in one direction makes the contact and in the other breaks it and moves the said drills out of the path of the drilled holes.

3. The combination, with a book-binding machine, of laterally movable electrically driven drills, suitably connected to a source of electric power, a make-and-break switch in the line, means to shift said drills laterally, and means to cause the movement of said shifting means to make and break said contact, one position closing the circuit and causing said drills to rotate, the reverse position opening the circuit and moving said drills out ofthe line of the drilled holes.

l. The combination, with a book-binding Y machine, of'a plurality of electrically driven drills suitably connected to a sourceof electric power, carriages on which said drills are mounted, a guide upon which said carriages are laterally slidable, an electrical contact in the line, a lever, a bar suitably connected to said lever, there being a plurality of spaced notches in said bar, pins on said carriages which engage said notches,a link connected to the end of said lever, a crank connected to said contact, said link being connected to the arm of the crank, whereby the movement of said lever inone direction makes the contact and in the other breaks it and moves the said drills out of the path of the drilled holes.

NELSON s. wELis 

